minfo=debug.getinfo(1, "S").source:sub(2);  p=minfo:match("(.*[/\\])") or "."
logf =p.."/lua_log.txt" Log = io.open(logf,"w")
class = "QJSIM"
sec = "SBER"    -- КОД ИНСТРУМЕНТА
local t={}
function main()
   while true do
       local x=CreateDataSource(class, sec,1);
      local y=x;
      Log:write(tostring(x).."\n");
         Log:write(tostring(y).."\n");
   sleep(1000);
   end
end

table: 0000014B7BA76EA0
table: 0000014B7BA76EA0
table: 0000014B7BA76760
table: 0000014B7BA76760
table: 0000014B7BA77020
table: 0000014B7BA77020
table: 0000014B7BA769A0
table: 0000014B7BA769A0
table: 0000014B7BA765A0
table: 0000014B7BA765A0
table: 0000014B7BA762A0
table: 0000014B7BA762A0
table: 0000014B7BA76AE0
table: 0000014B7BA76AE0
table: 0000014B7BA76BE0
table: 0000014B7BA76BE0
table: 0000014B7BA76620
table: 0000014B7BA76620
table: 0000014B7BA77A20
table: 0000014B7BA77A20
table: 0000014B7BA771A0
table: 0000014B7BA771A0
table: 0000014B7BA778E0
table: 0000014B7BA778E0
table: 0000014B7BA77F20
table: 0000014B7BA77F20
table: 0000014B7BA780A0
table: 0000014B7BA780A0
table: 0000014B7BA77C60
table: 0000014B7BA77C60
table: 0000014B7BA772A0
table: 0000014B7BA772A0
table: 0000014B7BA77220
table: 0000014B7BA77220
table: 0000014B7BA77360
table: 0000014B7BA77360

if sec.data_source then  -- sec - торгуемый инструмент
    sec.data_source:Close()
end
sec.data_source = _G[ 'CreateDataSource' ]( sec.class, sec.code, _G[ 'INTERVAL_M1' ] )
if not sec.data_source then
    log.error( '...' )
end

  $ lua
Lua  5.4 . 8   Copyright (C)  1994  -  2025  Lua.org, PUC - Rio
 >  f  =   function (x)  return  x * x  end 
 >  f( 6 )
 36 
 >  t  =  {aaa  =  f}
 >   t.aaa ( 8 )
 64 
 >  t  =   nil 
 >   t.aaa ( 3 )
stdin: 1 : attempt to index a  nil  value (global  't' )
stack traceback:
   stdin: 1 :  in  main chunk
   [C]:  in  ?
 >  f( 4 )
 16   

$ lua
Lua 5.4.8  Copyright (C) 1994-2025 Lua.org, PUC-Rio
> f = function(x) return x*x end
> f(6)
36
> t = {aaa = f}
> t.aaa(8)
64
> t = nil
> t.aaa(3)
stdin:1: attempt to index a nil value (global 't')
stack traceback:
   stdin:1: in main chunk
   [C]: in ?
> f(4)
16

    table: 0000027F53E0C620
table: 0000027F53E0C2A0
table: 0000027F53E0C3A0
table: 0000027F53E0C820
table: 0000027F53E0C460    

  table: 0000027F53E0C620
table: 0000027F53E0C2A0
table: 0000027F53E0C3A0
table: 0000027F53E0C820
table: 0000027F53E0C460  

table: 0000027F53E0C620
table: 0000027F53E0C2A0
table: 0000027F53E0C3A0
table: 0000027F53E0C820
table: 0000027F53E0C460